The operating system is being launched to current Windows 7 and Windows 8 users in phases, so the number of devices now running Windows 10 will rise steadily in the coming days as more users get access to the platform.

The dealer wars just got more interesting. Luxury electric-vehicle manufacturer Tesla launches a referral program, with new owners receiving $1,000 discounts and those making the referrals getting $1,000 of their own.